Process Equipment and Plant Design Questions

• Which of the following types of reactors is the safest from operation point of view?
• Pick out the wrong statement pertaining to 'Horton sphere' used for the storage of liquid ammonia.
• Normal screwed fittings are used for pipes upto a diameter of __________ inches.
• A perforated plate has holes of diameter dn arranged in a pitch ph. Each hole has a tube of I.D. dt passing through it. The ligament efficiency is given by
• Diameter of the seive tray column is determined by the
• __________ shapedroof is the most commonly used roof for cylinderical storage tanks.
• In the design of a paddle agitator, the ratiois normally taken as
• In case of a 'thin' pressure vessel, the ratio of its diameter to wall thickness is
• __________ is the determining factor for the number of bubble caps to be used per tray.
• At the following point for a given packing and set of fluids, the pressure drop per metre of packed height, with variation in fluid rates and operating pressure
• If 'D' is the inside diameter of the shell of a shell and tube heat exchanger, then the baffle spacing is usually in the range of
• Weep holes provided in the plates of a distillation column
• for a Tee (used as elbow, entering branch) would be
• Tube wall thickness depends on the cor-rosiveness of the fluids and their operating pressure & temperature and is specified by Birmingham wire gauge (B.W.G)-a number which varies from 8 to 18 with the numbers 14 and 16 being more commonly used. Outside diameter of tubes varies from about 15 to 50 mm; however a tube of less than __________ mm outside diameter is generally not recommended for fouling fluids.
• In actual operation of distillation column, the vapour is not distributed uniformly among the bubble caps, primarily because of the
• Brass valves are usually made for pipe sizes __________ inches.
• Low pressure steam (with saturation temperature between 105 to 120°C) is usually used in the vacuum evaporators, which normally employ a vacuum of about __________ mm Hg (referred to a 760 mm mercury barometer).
• High pressure fluid in a shell and tube heat exchanger should preferably be routed through the
• The LMTD correction factor (FT) is applied in __________ heat exchangers.
• The minimum shell thickness for tank ≤ 15 metres diameter is limited to __________ mm, for reasons of elastic stability.